david muir, just back from japan, tells us the latest at this hour. david? >> reporter: diane, as you know, they are describing the fear as that earthquake struck before they even knew the extent of the damage, and of course the crisis that would follow. this evening, another sign of that growing crisis from a hospital inside that evacuation zone. tonight, for the first time, workers from inside fukushima, when disaster struck. this man was standing outside, in between reactors. he didn't want to show his face, but he said, i thought the building would be stronger. i would never imagine the building would turn out the way it did. another from inside reactor four. the building shook sideways and the lights went out. still another from inside reactor three. it was shaking violently for a long time. i was very scared while it was shaking. and tonight, this image. the head of tokyo electric running that nuclear plant, in tears after addressing the cameras. and from inside the evacuation zone, a disturbing picture just emerging. this hospital at its breaking poin